Shredding-machine.



No. 877,689. PATENTED JAN. 28, 1908.

- M. F. WILLIAMS.

.' SHREDDING MACHINE.

3 SHEETS-SHEET 1.

APPLICATION FILED MAY 26,1906.

,z'zzmivw'zmmgg 5, ,1 mm @227 J7me? No. 877,689. PATENTED JAN. 28, 1908' M. P. WILLIAMS. SHREDDING MACHINE.

APPLICATION FILED MAY ZGUJOB. v7

3 SHEETS-SHEET 2.

No. 877,689. PATENTED JAN. 28, 1908. M. P. WILLIAMS.

SHREDDING MACHINE.

. APPLIC'ATION FILED MAY 2a, 1906. v

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nn'rrnsrnrns oisisicn MILTON F. WlLLIdMS, OF ST. LOUIS, MISSOURL'ASSIGNOR T WILLIAMS IA'TENT GRUSHER & PULVERIZER COMPANY, OF ST. LOUIS, MISSOURI,

A GGRI ORATION OF MISSOURI.

SEEDDING-MAWUEL No. screen.

Specification of Letters Potent.

.Z stented den. 2%, 1 .908.

Application filed Key 26. 1936. Serial lie. 313 335,

To all whom it mug; concern:

Be it known that 1, Mirror; F. WILLIAMS, a citizen of the United States, residing at St. Louis, Missouri, have invented as certain new 5 and ueetul Inmrovement in Shredding-Machines, or? which the following is afnll, clear, end exact description, such as will enable others skilled in the cart to which it appertion of the grinding surface.-

i This invention relates to shredding machines, and perticularly to machines for shredding or grinding u gummy fibrous niateriol such, for exam e, as guayele. The machines which have cretofore been in-use for grinding up material of this character have not proved entirely satisfactory due to the fact that soon after the machine had been in use a portion of the grindin surface became clogged with the matcria being operated on. Furthermore, said machines were so constructed that they could not be used during the time the grinding surface was be ing cleaned, and accordingly, a deal of time was wasted.

One object of my invention is to provide a machine particularly adapted for shredding guayelc and which is so constructed that no 40 particular portion of the grinding surface will become clo god sooner than other portions of said grinding surface' Another object of my invention is to provide a machine of the character described having arcrnovablc grinding surface so that when. one grinding surface becomes clogged another can be substituted therefor and thus 5 enable the rnachine to be. used continuously. Qther deslrable features of my invention Wlll be hereinafter pointed out.

The machine herein shown which TGPISa vided; and i 5 is a sectional view of a pow sents the preferred form of my invcntion'is provided with a perforated grinding surfncc with which a rotary winged beatercoopcratcs,

said heater being mounted in o, closed seeing. The hector cooperates with the edges of the openings in the grinding surface to shred the materiel which is forced through said 0 enings, and to prevent the finished 'shr material from lodging on the outer face of that portion of the grinding surface which entcnds over the heater and thus quickly clog up this portion of the grinding surface, I have arranged n closed chamber at this point and have provided an air conduit or passageway lending from this chamber to a point in side of the grinding suriece adiacent the cons ter of rotation of the beater. The, action of the heater in its closed casing is substantially the same as that of a fan located in a casing in which an eye is formed so that the shredded material which passes through said grinding surface into said charhbcr will be drawn through the conduit or passagewayto the in terior of the grinding surface and thus prevent that portion of the grinding surface which extends over the beater from becoming clogged sooner than any'othcr portion of the grinding surface, the rotation of the beater causing'a suction to be created in this chamber and thus helping to draw the me.- terial through the grinding surface. This closed chamber is located adjacent thc rear side of the opening through which the material is introduced into the machine so that in case there should be any tendency for the dust which rises from the metcria-l to pass out of the receiving opening, the suction in said closed chamber will drew the dust into same and thus revent the dust from escaping through t c receiving opening. The grinding curiae-c is preferably formed in sections which enables the entire grinding surfee or sections thereof tobe re laced quickly when it becomes clogged and ti us permit the machine to be used continuously.

The casing of the machine is spaced away some distance from the grinding surface so that c chamber is formed out-side the lower portion of the grinding surface into which the iini; i materiel passes and for removing this finished rnaterisl from the machine I hsvc semi-ring shape.

I provided the casing with a discharge opening.

grinding surface formed from perforated sheet metal it should be understood that my invention is not limited to a nachine having a grinding surface of this particular description,

. it being immaterial so far as my broad idea is concerned what type of grinding surface is used.

Referring to the drawings which represent the preferred form of my invention, 1 designates the casing of the machine which ispreforably formed in two sections, a lower section A and an upper section B provided with a member 2 whichcan be hooked onto a lifting device and thus bodily remove the upper section from the lower section. Connected .to the side walls of each section of the casing are semi-circular plates '3 which constitute a ring when both sections of the casing are in position and act as asupport for the grinding surface. The grinding surface, which is cylindrical and surrounds a winged heater 4, is preferably formed of sheet metal having slots 5 formed therein, and this grinding surface is also formed in two'sections C and D which are riveted to frames formed by transversely extending bars 6 niortised into pieces 7 of The lower section C of the grinding surface is retained in o erative position by means of clamps 8'whicfi engage the outer edges of the sem1-ring shaped pieces 7 and thus hold the grinding surface securely seated on the circular shaped plates 3 connected'to the side walls of the casing, and these clamps are provided with laterally extending pins 9 W ich project throu h elongated slots 10 formed in the side wal s of the' casing. Each of the pins 9 is provided with an interiorly screw-threaded head 1 1 through which a screw-threaded actuating shaft 12 extends, 'said shafts being journaled in lugs 13 on the casing, and rovided at their outer ends with sprocket wllcels 14 which receive sprocket chains 15. As herein shown, four screw-threaded shafts are provided for each clamp, and theends of the upper shafts are squared to receive a wrench or other suitable actuating device. A feed opening 16 is formed in the npper section of the casing, and the upper section of the grinding surface is held in position by a clamp 17 which is constructed and operated similarly to the clamps which hold the lower section of the g inding surface in position except, however, t at only the finishe been thrown out through the slots in the grinding surface, this suction preferably bethe casing, as shown in Fig. 2.

two screw-threaded shafts 18 are provided for erably a hinged door 20, and at its rear end- 1 with an opening 21 which communicates with some device for creating a'suction to exhaust the chamber outside the lower portion of the rinding surface and'carry awayshred'ded material which has ing great enou h to tend .to draw the mate rial through t e openings in the grinding surface. the front end of the casing air is admitted to the casing so as to get a direct draft through the machine.

As shown in Fig. 2 of the drawings, the

By opening the door or valve atgrinding surface is arranged near the ends of the wings of the beater and the edges of the slots in said grinding surface cooperating with said wings act to shear the material being operated on and shred it into fine parti cles.

As reviouslystated, unless means were provided for carrying away'the finished material which falls onto the outer face of that portion 'of the grinding surface which extends above the beater, said portion would soon get clogged and consequently, would be ineffective. For preventin .material from lodging on this portion of t e grinding surface I-have arranged a chamber outside of the grinding surface and, at the rear side of the feed opening 16, and a conduit ortube 22 ex tending from this chamber to a point adjacent the. axis of the beater, as shown in Fig.

3, which point I have designated the eye of i the machine. The chamber justreferred to is formed by the walls of the casing and the partition 23 which extends inwardly from As previously stated, the beater being mounted in a closed casing acts as a fan, thus creating a suction'in'this chamber and con-'" duit 22 to draw the shredded material from the outside of the upper portion of the grinding surface into the interior of the grinding surface, thereby operating to keep the upper portion of the grinding surface perfectl clean and prevent the shredded 'niateria from packing thereon. To prevent a vacu um from being created in the chamber over the upper portion of the grinding surface, the ortion 23 is made in the form of a sliding va ve and I have also provided an additional sliding valve 23', either of which i would be necessary if the grinding were cleaned without removing t may be'cpened to permit the entrance of air.

into this chamber, see Fig. 2. Another'advantage in providing a machine of this ty e with a closed chamber'iit the rear side of tiie feed Opening and connecting this chamber with the eye of the machine by 'means of a conduit, is that it prevents any of the dust from the material from passing through the feed opening in case-the dischar e opening of the machine should become choked, the suction in said chamber drawing the dust into same before it reaches the feed opening and thus returning it to the interior of the grinding surface. Whenthe entire grinding surface becomes clogged the upper section of the casing 'is lifted bodil from the lower section and the clamps WhlCh hold the grinding surface in position are loosened; the sections of the grinding surface being then re laced by ones which are clean. According y, the

machine is out of service for only a short time instead of for an extendedperiod as surfaces em from construction is that it permits different kinds of grindin surfaces to be a plied to the machine w-it very little troubiia.

Havin thus described my invention, what I c aim as new and desire to secure by Letters Patent is: i I

1. In a machine of the class described, a casin having a rotary beater mounted.

therein, a grinding surface surrounding a or-- tion of the beater, a partition, exten ing from the casing to the grinding surface, a

wall extending from the casing to the grinding surface and 006 rating with the partition to form a cham er outside of the grinding surface, a valve for admitting air to said chamber, and means for conveying the material which collects in said chamber back into the interior of the rinding surface; substantially'as described. i

2. A grinding machine comprising a casing having a-rotary beater mounted therein and rovidedwith a feed opening, a grinding surace inside of the casing, a closed chamber arranged adjacent the feed opening, and a conduit leading from said chamber to the interior of the grinding surface 3 substantially as described.

3. A grinding surface comprising a casing having a feed opening, a rotary heater and a grinding surface arranged inside of said casing, one end of said grinding surface t'erminating at the rear side of the feed opening, a closed chamber located at the rear slde'of the feed opening and having its bottom-formed by a portion of the grinding surface, and. a conduit leading from said chambefto a point adjacent the eye of the machine; substantially as described.

4-. In a machine of the class described, a casing, a grinding surface, stationary abutments carried by the side walls of the casing with which said grinding surface contacts, and adjustable clamps for holding said grindmg surface in intimate engagement with said abutments; substantially as described.

5. In a machine of the class described, a circular grinding surface formed of perfce rated sheet metal, curved abutments connected to the side avails of the casing of the machine and bearin against the inner face of the end portions 0 said grinding surface, a plurality of clamps conforming to the contour of the grinding surface and adapted to engage the outer face thereof, and means for actuating said clamps simultaneously; sub- 6. ha machine of the class described, a casing,. abutments connected to the side Walls of said casing, a circular grinding surface adapted to bear against said abutments, removable clamps conformin to the'contour of the grinding surface an enga ing the outer face thereof,- ins extending laterally from said clamps t ough openings in the side alls ofthe casing, said pins being pro-v vided with heads, having interior screw threads, and screwthreaded shafts. extendizigthroughsaid. heads for actuating the clam s; substantially as described.

7 n a machine of the class described, a casing formed 1ntwo sections, the up er one of which is adapted to be lifted bodi y from.

the lower section, a. circular rinding surface constructed of perforated s eet metal and formed in two sections, a plurality of clamps for holding the sections of the grinding surface in operative osition'in the respective sections of the casing, and adjustable means mounted on each section of the casing for actuating the clam s carried thereby; substantially as descri ed.

8. In a machine of the class described, a closed casing provided with an entrance opening and a door located at the front end of the casing in alinement with the discharge opening, a grinding surface removably held in lace inside of the casing, an adjustable reaker plate located adjacent the entrance opening in the casing, a rotary Winged beater arranged inside of the grindin surface and operating to force the materia through the 9. A grinding machine comprising a easin provided at its upper front end with a -fee( opening and at its rear end with a'discharge opening through which thematerial is drawn by suction, a grinding surface and a rotary beater arranged inside of said casing andlan adjustable veiveiocated in the front wall of the casing below the grinding surface and in slinement with the discharge opening for addescribed.

In testimony whereot',.I hereunto affix my signature, in the gies'ence of two'fwitnesses, this twenty third ay of May 1906' MILTON F. WILLIAMS. Witnesses: v

F. R. CORNWALL,

GEORGE BAKEWELL. 

